diff --git a/ArmPlatformPkg/ArmPlatformPkg.dec b/ArmPlatformPkg/ArmPlatformPkg.dec
index 3a25ddcdc8..dd6e78f62a 100644
--- a/ArmPlatformPkg/ArmPlatformPkg.dec
+++ b/ArmPlatformPkg/ArmPlatformPkg.dec
@@ -94,6 +94,7 @@
   gArmPlatformTokenSpaceGuid.PcdSerialDbgRegisterBase|0x00000000|UINT64|0x00000030
   gArmPlatformTokenSpaceGuid.PcdSerialDbgUartBaudRate|0x00000000|UINT64|0x00000031
   gArmPlatformTokenSpaceGuid.PcdSerialDbgUartClkInHz|0x00000000|UINT32|0x00000032
+  gArmPlatformTokenSpaceGuid.PcdSerialDbgInterrupt|0x00000000|UINT32|0x00000041
 
   ## PL061 GPIO
   gArmPlatformTokenSpaceGuid.PcdPL061GpioBase|0x0|UINT32|0x00000025